This Cardio Abs Workout Takes Only 20 Minutes But Works All Your Major Muscles

 Feel free to add it to your regular fitness routine or up the ante and complete the entire four-week workout plan for an even more hardcore sweat test.

Time: 20 minutes

Equipment: mat

Good for: abs

Instructions: Complete the prescribed number of sets and reps for each move, resting for one minute in between sets, then immediately continue to the next exercise.

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1 Move 1: Scap Pushup

How to: Start on all fours. Spread shoulder blades wide across back like you're trying to imprint a bra line on the ceiling, and then squeeze shoulder blades together as you lower chest toward mat without bending your arms. That's one rep. Complete the number of reps designated below and then move on to the next exercise.

Week 1: 4 sets of 8 repsWeek 2: 4 sets of 12 repsWeek 3: 5 sets of 8 repsWeek 4: 5 sets of 12 rep

2 Move 2: Plank Jacks

How to: Start in a plank position. Hop feet out slightly wider than shoulders, then hop them back together. Keep hips level. That's one rep. Complete the number of reps designated below and then move on to the next exercise.

Week 1: 4 sets of 30 secondsWeek 2: 4 sets of 45 secondsWeek 3: 5 sets of 30 secondsWeek 4: 5 sets of 45 second

3 Move 3: Kneeling Pushup to Bird Dog

How to: Begin in a knee plank, tail bone tucked under, index fingers pointing straight forward, and fingers spread wide. Lower down, pulling shoulders away from ears, elbows slightly in toward the ribs. Lower back to knee plank. That's one rep. Alternate which arm/leg you lift after each pushup until you've completed the designated number of reps below then move on to the next exercise.

Week 1: 4 sets of 8 repsWeek 2: 4 sets of 12 repsWeek 3: 5 sets of 8 repsWeek 4: 5 sets of 12 reps

4 Move 4: Stretch Jump to Plank

How to: Start standing in the middle of your mat with feet together and hands at sides. Swing hands overhead and take a tiny hop straight up off the mat. Land and immediately bend knees, folding forward to place hands on floor. Jump legs back to land in plank position. Stand and swing arms back overhead to take another tiny hop straight up off mat. That's one rep. Complete the number of reps designated below and then move on to the next exercise.

Week 1: 4 sets of 12 repsWeek 2: 4 sets of 15 repsWeek 3: 5 sets of 12 repsWeek 4: 5 sets of 15 rep

5 Move 5: Side Plank With Elbow Twist

How to: Start in a side plank with feet flexed, left foot stacked on top of right, upper body propped on right forearm, elbow underneath shoulder, and left hand behind head. Rotate at waist to bring left elbow down to touch mat. Keep hips high and lower body stable. Return to start. That's one rep. Do as many reps as possible for the time allotted below and then alternate sides for each set.

Week 1: 4 sets of 30 secondsWeek 2: 4 sets of 45 secondsWeek 3: 5 sets of 30 secondsWeek 4: 5 sets of 45 second